According to the notice, this strap inventory will primarily be for customers who would like to swap the band that comes pre-bundled with their Apple Watch after their purchase. Secondary to this, these early band shipments for stores will be available as replacements for worn-out bands from the various store Apple Watch try-on stations. Lastly, remaining inventory will be available to be sold to customers seeking an additional band for their Apple Watch.
If replacement bands do arrive this week, it could signal that Apple is starting to get a better hold on meeting demand for the wearable. According to an earlier report, Apple is also preparing to bring the Apple Watch to Apple Stores in June. In other words, if things pan out, Apple Stores may soon become a one-stop-shop for all things Apple Watch.